I buy this lock to heuresement not atacher heuresement but my bike helmet and although I wanted to try his solidated pulling by hand and only the lock side and part is simply undoes all by forcing hardly j ' am moult and stay longer next spiral of my income on my hand and hopefully hurt without occasioned blesure. a product has strongly discouraged and all for a bike what it mocks you on !! ok for the price you can not ask for the moon but when same ..... when to request a refund if amazon wants to do something he does not see any gene on the very good customer I am !!! case follow ....